Stuffing box



y R. D. HILL STUFFING Box Filed-Aug. s, L1934 Feb. 2, 1937'.

Bienal@ 17H1!! INVENTOR ATTORNEY Patented Feb.- 2, 1937 n.fmp ...STATES PATENT.

STUFFING BOX Richard D. Hill, Wichita. Falls, Tex.,. assignor of twenty-tive per cent to Ralph Decker, twentylive per cent to W. L. Robertson, and fifty per cent to L. D. Mowrey, all of Wichita Falls,

Tex.

Application August 8, 1934, Serial No. '138,174

1 Claim. y(Cl. 286-15) 'Ihis invention relates toA well pumping-apparatus and it has particular reference to improvements in stufllng boxes.

' The principal object oi' the invention is to proy vide a stuiilng box which is capable of following a stuillng box combined with or capable of being 1g attached to an element which allows for more or less universal displacement of thelstumng box in order that it may follow the movements of the rod and thereby prolong the'usefulriessl of `the packing therewithin and yet will not impose frictional wear upon the rod to cause possible breakage which is frequently the case in conventional types of stuiilng boxes,

With the foregoing objects as paramount, the invention has .particular reference to its salient features of construction and arrangement oi' parts which will become manifest as the descrip'- tion proceeds, taken in connection with the accompanying drawing, wherein:-

Figure l is an elevation of the invention in axial section taken on lines I-I on Figure 2.

Figure 2 is a view on lines 2-'-2 on Figure 1.

Figure 3 is a view similar 'to Figure 1 but shows the stuillng box displaced relative to its mounting, and is taken on lines 3 3 on' Figure 4. Figure 4 is a view on lines 4-4 on Figure 3, and f Figure 5 is a detail view of one of the lateral arms broken away from the body of the stuiilng box.

Continuing with -a more detailed description of the drawing, I dignates the main body of the stuillng box, having at its top a pair of diametrically opposed ears 2 and which are aper- 5 tured to receive'bolts 3. A flanged packing retainer 4 is held in adjustable relation to the packing I by the bolts l asapparent in Figures l' and 3.

Midway between the ends of the body I, dia- 50 metrically opposed armst are provided which have apertures I therein whose diameters are considerably greater than the diameter of the bolts l which are required to pass therethrough and engage apertured ears 9 carried upon the 55 upper end of the lower member or mounting Ill crystallization thereof .and consequent ultimateof the stumng box. The factuur the openings or apertures 1 are larger than bolts 8 permits of movement of the bodyi `or stuflingbox proper with respect to the mounting or lower portion I0'. the. advantage of which is obvious but will be againmentioned presently. l

With the mounting Ill is provided secondary,

packing I I of comparatively soft Vresilient material such as rubber or some other suitable composition. This packing surrounds thev tubular sleeve I2, the latter in turnvsnugly embracing the polished rod I3 and which is threaded into the lower end of the body yI of the stufllng box. The function of the sleeve I2` is of great importance and aids considerably in prolonging the life of the stuillng box. Ordinarily, fluid surges up'- wardly-against the stufhng box packing in the .frigid or conventional type of stuillng box. on the upward stroke of the pump rod and since some sand is usually entrained in the fluid, the packing wears rapidly and'must be frequentlyreplaced. It is obvious from an examination oi Figures 1 and 3 that packing 5 is isolated from the fluid by the sleeve I2 and only the secondary packing I I is exposed thereto which is of no consequence since the latter packing is not sub- Jected to the frictional wear of the rod I2.

Accordingly, the lower member or mounting Ill is threaded uponA the tubing I4 by a suitable wrench or the like vapplied to the lower portionv The stufllng box I is then apofthe member. plied to the mounting and secured thereto by bolts 8. As the rod I3 moves upward, it is displaced relative to the tubing I4 and mounting' III in the manner illustrated in Figures 3 anda. Due however, to the size of the apertures 1 in comparison to that of the bolts 8, the stumng box I is capable of sliding or compressing the packing II and thereby follows the rod I3. This is true also of the downward stroke of the rod I3 aswell as any lateral movements of the'rod. In any case however, the packing 5 is protected against undue wear both from'the standpoint of wear which would ordinarily be imposed thereon by' the arcuate travel of the rod orvdeviation from the perpendicular and from the standpoint of the wear which would otherwise be assumed as imposed by sand laden fluid. 'I'he sleeve I2 positively protects the packing 5 against the latter condition.

Manifestly, the construction shown is capable of considerablemodiilcaton and such modiiication as is considered within the spirit and intent of the invention is also considered within the scope and meaning of the appended claim'.

do polish rod, means connecting the stumng box and support together for relative movement therebetween. and a sleeve nxed to the stumng be* and closely embracing said rod for movement therewith during movement ot the stumng box end in said recess. sai'd sleeve extending into the well tubing a distance below the lower end oi the support to retard passage of liquid upwardly between the said rod and stuiilng box packing.

RICHARD D. HILL. 

